earlier today he was in london. his 11-day trip will also include paris, rome, cairo, and abu dhabi. on the agenda, the syrian conflict. israeli/palestinian tensions and iran's nuclear program. >> and iran with a nuclear weapon in that region and given all that has happened is simply unacceptable. and we have stated that they will not obtain a nuclear weapon. president obama has been crystal clear about this. >> reporter: meantime iran is getting ready for another round of talks, the nuclear negotiator arrived today to meet with what's being called the p-5 plus one, the u.s., britain, russia, france, and germany. the meeting is scheduled to begin tomorrow. iran insists its nuclear program is for peaceful energy purposes only. any chance of negotiating in syria shot down after a nearly two-year civil war, the syrian regime said it's ready for talks with rebels but opposition members scoffed at the day's offer. they also said they will not participate in the meeting next month in rome with its western and arab allies